This video provides a quick walk through of how to install garage door weather seal. The long PVC weather seal strips were purchased at Lowes for under each. Installing weather striping will help keep your garage warmer in the winter by cutting down on drafts. It will also help keep your garage cooler in the summer. and also cut down on unwanted insects. Insulation and weather stripping will pay for themselves over time and will also help make your home more comfortable.